Hi Tim,
Glad you are enjoying the Aero...tippy little buggers!
1. Do you mean a velcro clew, rather than tack, strap? Not sure that the boat would be stable enough to allow you to detach a velcro clew strap whilst afloat. Once you have your feet on the bottom it only takes a couple of seconds to drop the main. As the rig is unstayed you can 'blow the knot' like Lasers do and let the rig blow forward when coming into a lee shore if that is your problem.
2. The jaws of the kicker cleat should centre themselves, or at least share the load sufficiently to keep hold of the control line. Either the jaws are worn so that the line is slipping or one of the springs has given up the ghost and the cam is exerting little or no pressure on one side.
3. Assuming that you have the loop, or daisy chain, snugged up against the cleat when the kicker is at its maximum 'off' position, the amount of pull shouldn't be excessive. As far as the cleat position is concerned...'it is what it is'. I think the position is about right on the boat but you can't change it anyway. The fitting itself is, in comparison to the quality of most of the remainder of the equipment, a bit of a let down and creates a lot of unwanted friction in the most frequently adjusted control system (mainsheet excluded).